Why setErrors() doesn't trigger child memo component render?

[Cow258]

Try the click Set Error and Clear Error button
Then the MemoComp will not be render expected

https://codesandbox.io/s/react-hook-form-ggrgsk?file=/src/App.js

[leapful]

@Cow258

Object errors will not change its reference via setErrors() method as it's a root error object and will be accessed via formState proxy.

If you want to get errors from memorized component, just use useFormState instead.

Working demo: https://codesandbox.io/s/react-hook-form-forked-qz6rkg?file=/src/App.js